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Old Mar 28, 2017 | 02:10 PM
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Default LED Mods

Is it necessary to install a "harness" when installing led lights for drl's, headlights, and rear brake lights for proper system operation?
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Old Mar 28, 2017 | 04:14 PM
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Originally Posted by 2ndvett01
Is it necessary to install a "harness" when installing led lights for drl's, headlights, and rear brake lights for proper system operation?
I would invest in the resistor harness that plugs in under the dash. It will stop the lights from flashing extra fast.

Also I road for a while without that and I feel it heated somethings up too much and burned through 2 multifunction switches which are pricey.

With the anti-flash harness no issues since.

Last edited by SuperTom; Mar 28, 2017 at 04:14 PM.
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Old Mar 29, 2017 | 08:38 PM
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Originally Posted by 2ndvett01
Is it necessary to install a "harness" when installing led lights for drl's, headlights, and rear brake lights for proper system operation?
Yes for the turn signals, if you want to eliminate hyperflashing.

In a C5 the turn signal and hazard functions are provided by the hazard switch. A hyperflash harness replaces the portion that handles the turn signals with a flasher that's LED friendly. Hazards will still hyperflash because that function remains untouched in the OEM hazard switch.

Last edited by GCG; Mar 29, 2017 at 09:13 PM.
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Old Mar 29, 2017 | 11:11 PM
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I installed LED halo tail lights on my '03 and the hyper flash harness was required to keep the lights from the rapid blinking. My flashers do not hyperflash when engaged.
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